WO1990002934A1 - Recipient jetable pour la preparation d'echantillons et procede permettant de preparer les echantillons pour l'analyse - Google Patents

Recipient jetable pour la preparation d'echantillons et procede permettant de preparer les echantillons pour l'analyse Download PDF

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Publication number
WO1990002934A1
WO1990002934A1 PCT/US1989/003835 US8903835W WO9002934A1 WO 1990002934 A1 WO1990002934 A1 WO 1990002934A1 US 8903835 W US8903835 W US 8903835W WO 9002934 A1 WO9002934 A1 WO 9002934A1
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WO
WIPO (PCT)
Prior art keywords
magazine
valve
chambers
container
housing
Prior art date
Application number
PCT/US1989/003835
Other languages
English (en)
Inventor
Marc E. Holtzman
Original Assignee
Holtzman Marc E
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Holtzman Marc E filed Critical Holtzman Marc E
Publication of WO1990002934A1 publication Critical patent/WO1990002934A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1095—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
    • G01N35/1097—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers characterised by the valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q

Definitions

  • This invention relates to a disposable container in which samples can be prepared automatically or semi-auto- maticaliy for analyses, such as the analyses of: blood or plasma samples for biomedical research or routine testing; pharmaceutical samples for production or research ⁇ urposes; ana more generally, samples requiring. for example, a plurality of routine chemical and/or mechanical treatments before analyses.
  • This invention also relates to a method of preparing a sampie for analysis in the disposable container.
  • Apparatus are known for facilitating the routine preparation by hand of samples for analyses.
  • such apparatus have included a plurality of chambers for holding samples and chemical reagents and for mixing them together. See, for example, U.S. Patents 3,913,790 and 4,227,096.
  • U.S. Patents 3,913,790 and 4,227,096 See, for example, U.S. Patents 3,913,790 and 4,227,096.
  • Such apparatus have not been adapted for automatically or semi-automatically preparing samples for analyses.
  • Apparatus are also known for automatically or semi-automatically preparing precisely measured and treated samples and delivering che samples to analysis equipment, such as liquid chromatographic equipment. See, for example, U.S. Patents 4,366,119, 4,363,782, 4.344,768, 3,929,411 and 3,860,393.
  • sample preparation apparatus have generally had to utilize relatively complicated means for conveying samples between various locations in the apparatus where different chemical and/or mechanical treatments are carried out before the samples are analyzed. This need to convey samples between various locations has inevitablv made such apparatus more expensive to construct and operate, Wavs have been sought, therefore, for simplifying and reducing tne automatic or semi-automatic movement of samples within such apparatus.
  • a disposable container which comprises: a magazine having a plurality of sample preparation chambers therein spaced about a vertical axis of the magazine; each chamber having a mouth at its top and an inlet/outlet port at its bottom; and a distributor valve beneath the magazine; the valve having in the top thereof at least one fluid flow communication channel that extends between at least two openings in the top of the valve; each opening in the top of the valve being adapted to establish fluid flow communication between tne channel and one of the ports of the chambers when the opening is located beneath the one port; the valve and the magazine being rotatable relative to one another about the axis of the magazine, so that the openings in the top of the valve can be located beneath the ports of different combinations of chambers to provide fluid flow communication between such different combinations of chambers through the channel.
  • This container can provide simplified movement of a sample between its chambers wherein different chemical and/or mechanical operations can be carried out to prepare the sample for analysis.
  • the container also lends itself to the automation of routine sample preparations.
  • FIG. 1 is a schematic top plan view of a disposable container of this invention, showing a magazine within the container that has a plurality of open-mouth sample preparation chambers therein.
  • Fig. 2 is a schematic sectional view taken along line 2-2 of Fig. 1.
  • Fig. 3 is a schematic bottom plan view of the container of Figs. 1 and 2.
  • Fig. 4 is a schematic sectional view taken along line 4-4 in Fig. 2; Fig. 4 shows the top surface of a distributor valve within the container of this invention; portions of the top surface of the valve have been cut away to show channels in the top of the valve that can provide fluid flow communication between chambers in the magazine which are shown in phantom.
  • Fig. 5 is a schematic top plan view, like Fig. 1, of an alternative embodiment of the container of this invention.
  • Fig. 6 is a schematic sectional view, similar to Fig. 2, taken along line 6-6 in Fig. 5.
  • Fig. 7 is a. schematic sectional view, similar to Fig. 4, taken along line 7-7 in Fig. 6.
  • Fig. 8 is a schematic sectional view, similar to Fig. 6, of another alternative embodiment of the container of this invention.
  • Fig. 9 is a schematic view of an apparatus which can be used for the preprogrammed, automatic or semi-automatic preparation of a sample for analysis in the container of Fig. 8.
  • Figs. 1-4 show a disposable, generally cylindrical, sampie preparation container of this invention, generally 10.
  • the container 10 comprises a generally cylindrical, outer housing 11 having a generally circular opening 12 at the top thereof.
  • a generally cylindrical magazine 13 that has its central vertical axis coinciding with the central vertical axis of the housing 11. Equally spaced about the central vertical axis of the magazine 13 are a plurality of generally cylindrical, vertically aligned, sample preoaration chambers A, B, C, D, E and F which are each open at the top.
  • the magazine 13 fits closely within the housing 11 and is preferably adapted to be inserted into the housing 11 through its opening 12 at the top.
  • Mating male and female detent members 14 are provided between the upstanding, generally cylindrical walls of the housing 11 and magazine 13 to position and retain the magazine within the housing, so that the magazine cannot rotate within the housing about its central vertical, axis and cannot move outwardly of the housing 11 through the opening 12.
  • other means for positioning and retaining the magazine 13 in the housing 11 can be used such as a threaded mating of the housing and magazine, pin locks, etc.
  • a rotary distributor valve 20 is also provided in the housing 11 of container 10, beneath the magazine 13 and atop a generally annular, inwardly extending iedge 22 on the bottom of the housing 11.
  • the top of the valve 20 is closely mated to the bottom of the magazine 13. and juxtaposed annular steooed members 24 in the valve and magazine permit the valve to be rotated relative to the magazine within the housing 11 about the central vertical axis of the magazine.
  • the valve 20 fits closely within the housing 11 and closely beneath the magazine 13 and preferably is adapted to be Inserted into the housing through its opening 12 at the top thereof. As shown in Figs.
  • the aperture 26 allows access to a plurality of key receptors 28 in the bottom of the valve 20 which can be used for grasping the bottom of the valve 20 so that the valve can be rotated about the central vertical axis of the magazine 13 while the housing 11 and magazine are held against rotation.
  • each port is an inlet/outlet pore 30 as shown in Figs. 1 and 2.
  • Each port is an inlet/outlet pore 30 as shown in Figs. 1 and 2.
  • the fluid flow communication means 32 preferably comprises a plurality of channels 36 in the top of the valve 20. At the ends of each channel 36 are a pair of openings 38 in the top of the valve 20.
  • the pair of openings 38 in each channel 36 can be disposed beneath the ports 30 of a pair of chambers A-F, that are adjacent to one another about the central vertical axis of the magazine, to establish fluid flow communication through the channel 36 between the ports 30 of the pair of adjacent chambers A-F.
  • the openings 38 in the channels 36 in the valve 20 in their positions in Fig.
  • the key receptors 28 can be used to rotate the valve 20 about the central vertical axis of the magazine 13 so that different pairs of chambers A-F are in fluid flow communication chrough the channels 36 in the valve 20.
  • the valve 20 can be rocaced clockwise 60 from its position in Fig. 4 so that the following different pairs of chambers are in fluid flow communication through the channels 36: B and C, D and E, and F and A.
  • the concainer 10 of this invencion and its housing 11, magazine 13 and valve 20 can be made of any conventional metal, glass and/or plastic materials.
  • the container 10 and its parts are made of a relatively strong out resilient plastic which is chemically inert to any reagents, with which they will come into contact.
  • the container 10 is preferably made of a relatively inexpensive plastic material, such as high density polyethylene or nylon, so that it can be suitably disposed of after being used for one complete preparation of a sample for analysis.
  • the valve 20 can be rotated manually relative to the magazine 13, the valve 20 is especially adapted to be rotated by conventional automatic means which fit into the key receptors 28 in the bottom of the valve and rotate the key receptors about the central vertical axis of the magazine 13.
  • the container 10 of this invention can be used to completely automate the routine preparation of a sample prior co its analysis.
  • the valve 20 can be rocaced automatically to move automatically the channels 36 beneath the ports 30 of different pairs of chambers A-F at differenc cimes so as to provide communicacion between different combinations of chambers A-F at different times depending upon, for example: a) the kinds of chemical and/or mechanical treatments which are to be automatically carried out within the different chambers A-F upon a sample; and b) the sequence of such treatments which are to be automatically carried out upon the sample.
  • che juxtaposed bottom of the magazine 13 and top of the valve 20 can be provided with means (not shown, for indicating that the valve 20 has been rotated to a position, relative to the magazine 13, where the inlet/outlet ports 30 of the chambers A-F are vertically aligned with the openings 38 at the ends of the channels 36 in the top of the valve 20.
  • Such means can comprise a plurality of mating male and female detent members (not shown) which: a) are located on the juxtaoosed surfaces of the magazine 13 and valve 20 about the central vertical axis of the magazine; b) mate only when the openings 38 are beneath the ports 30; and c) restrain but do not effectively prevent the valve 20 from being rotated relative to the magazine 13.
  • the top of the magazine 13 can be provided wicn means (not shown) for indicating che position of the specific chambers A-F in the magazine about its central vercical axis.
  • Such means can comprise one or more upstanding projections (not shown) on top of the magazine 13 between one or more specific chambers A-F.
  • the container 10 can be used with automatic or semi-automatic sample preparation equipment (not shown) which can: a) deposit a sample and/or solvents within the chambers A-F through their open mouths 31; b) urge the samples and solvents to move between the chambers A-F through their inlet/outlet ports 30 and through the openings 38 and channels 36 in the top of the valve 20; c) subject the samples and solvents to various chemical and/or mechanical treatments within the chambers A-F; and/or d) remove the samples, after they have been treated with the solvents and subjected to chemical and/or mechanical treatment, from the chambers A-F for analysis.
  • a conventional filter 40 can be automatically provided within chamber C of the container 10 as shown in Fig.
  • a liquid sample can be automatically provided in chamber C above the filter 40; and then the sample can be urged automatically to flow downwardly through the filter 40 and through one of the channels 36 into chamber D.
  • a disposable plunger (not shown) can be automatically provided on top of chamber C and then urged inwardly of cnamber C, to urge the liquid sample to flow through the filter 40 and into chamber D, after the liquid sample has been provided in chamber C.
  • the liquid sample in chamber D can be automa t ical ly subjected to, for example, a liquid-liquid extraction, after which the extract can be urged automatically to flow, for example, to chamber E in container 10 by automatically rotating valve 20 clockwise 60 from its position in Fig.
  • a plurality of the containers 10 holding different samples can also be provided on a rotating carousel (not shown) that is located beneath such automatic or semi-automatic sample preparation equipment and that can automatically or semi-automatically position the containers 10 beneath the different pieces of such equipment for treatment at different times so that each piece of equipment can, if desired, perform its chemical or mecnanical treatment upon the samples in the chambers A-F of each container 10 on the carousel at different times, depending upon the type and sequence of treatments to be used for preparing each sample.
  • the container 10 of this invention can be used to prepare routine samples for analysis, using automated equipment and techniques.
  • the container 10 can thereafter be disposed of, so that the danger of cross-contamination between samples, being analyzed, is virtually eliminaced.
  • the container 10 can, If desired, be cleaned and reused after each sample preparation.
  • Figs. 5-7 show a disposable, generally cylindrical, sample preparation container, generally 110, in accordance with an alcernacive embodimenc of this Invention.
  • the concainer 110 has a generally cylindrical magazine 113 within a generally cylindrical, outer housing 111.
  • Mating male and female detent members 114 are provided between the waiis of the housing 111 and magazine 113.
  • a rotary distributor valve 120 is within the housing 111 beneath the magazine 113 and atop a generally annular ledge 122 at the bottom of the housing.
  • the bottom of the valve 120 has a plurality of key receptors 128 which are accessible through an aperture 126 in the bottom of the housing 111 and which can be used for rotating the valve within the housing about the central vertical axis of the magazine 113, while holding the nousing and magazine against rotation.
  • the container 110 of Figs. 5-7 is, in all essencial respects, like the container 10 of Figs. 1-4, except the container 110 has an additional, generally cylindrical, vertically aligned, sample preparation chamber G at the center of its magazine 113 and has three different channels, generally 136, in the top of the valve 120. In this regard, two channels 136a and 136b only have openings 138 in the top of the valve 120 at tneir ends.
  • These two channels 136a and 136b are adapted to provide fluid flow communication only between the inlet/outlet pores 130 at the bottom of adjacent chambers, such as chambers D and E in Fig. 7 which have their ports 130 located directly above the openings 138 at the ends of one of these channels 136a.
  • the third channel 136c has openings 138 both between and at its ends.
  • This channel 136c can provide fluid flow communication between the ports 130 of a plurality of chambers, such as chambers A, B, C and G in Fig. 7 having their pores 130 locaced above the openings 138 in the channel 136c.
  • chamber F is not in fluid flow communicacion with the other chambers.
  • the key recepcors 128 can be used to rotate the valve 120 about the central vertical axis of the magazine 113 so that different chambers A-G are in fluid flow communication through the channels 136 in the top of the valve 120.
  • the valve 120 can be rotated clockwise 60° from its position in Fig. 7 so that: adjacent chambers C and D are in fluid flow communicacion chrough the channel 136b; chambers A, E, F and G are in fluid flow communication through the third channel 136c, and chamber B is not in fluid flow communication with the other chambers.
  • Fig. 8 shows a disposable, generally cylindrical, sample preparation container, generally 210, in accordance with another alternative embodiment of this invention.
  • the container 210 of Fig. 8 is, in all essential respects, like the container 110 of Figs. 5-7, except the container 210 has: a mating male and female detent members 214 provided between the upstanding, generally cylindrical walls of the housing 211 and the rotary distributor valve 220 to position and retain the valve 220 within the housing 211 so that the valve cannot rotate within the housing about its central vertical axis; and b) an annular key 215 and mating keyway 216 in the generally cylindrical walls of the housing 211 and magazine 213, respectively, to retain the magazine within the nousing but allow the magazine to rotate within che housing about its central vertical axis.
  • Key receptors 228 on the bottom of the valve 220 can be used for grasping and holding the bottom of the valve so that the valve and housing 211 do not rotate about the central vertical axis of the housing when the magazine is rotated about its central vertical axis.
  • the magazine 213 and the valve 220 can be rotated relative to one another about the axis of the magazine by rotating the magazine and simultaneously grasping the key receptors 228 of the valve 220 to prevent them from rotating, whereby the openings in the top of the valve can be provided beneath the inlet/outlet ports 230 of different combinations of chambers A-G to provide fluid flow communication between such different combinations of chambers through the channels in the valve.
  • FIG. 9 Schematically shown in Fig. 9 is an apparatus, generally 250, which can be used for automatically or semi-automatically preparing samples for analysis in the container 210 of Fig. 8 by a procedure which can involve rotating the magazine 213 about its central vertical axis.
  • the apparatus 250 includes three manipulating probes 252, 254 and 256 which are arranged in a row and each of which is vertically aligned.
  • the probes 252, 254 and 256 can be positioned above tne container 210 and can be raised and lowered hvdraulicaily into different chambers A-G of the container 210 by means of a conventional master hydraulic cylinder 258 that is powered by a conventional first stepper motor Ml.
  • the master cylinder 258 is connected to three conventional dependent hydraulic cylinders 259, each of which is connected to, and controls che vertical movement of, a differenc one of the probes 252, 254 and 256.
  • the master cylinder 258 also is connected to a conventional hydraulic fiuid reservoir R.
  • the fluid connections between the master cylinder 258 and the dependent cylinders 259 and the reservoir R are governed by a pair of conventional, multi-position, high pressure control valves 260 and 262.
  • the probes 252, 254 and 256 and their dependent cylinders 259 are preferably mounted on a generally horizontal support structure 264 which can be rotated by a second conventional stepper motor M2 about the central vertical axis of the middle probe 256.
  • the magazine 213 can be rotated about its axis in a controlled manner by rotation of the inserted probes about the axis of the middle probe 256 powered by the second motor M2.
  • each probe 252-256 is adapted to be inserted downwardly into one of the chambers A-G of the disposable container 210 of Fig. 8, through the open mouth 231 thereof.
  • the bottom of each probe can be the same, but preferably, the bettors of each probe is different so that each can perform a different function when inserted into one of the chambers A-G.
  • the support structure 264 for the probes 252-256 is preferably adapted to be rotated 360° about the axis of the middle probe 256 by the second motor M2 so that each of the outer probes 252 and 254 can be inserted into any of the peripheral chambers A-F of the container 210. As shown in Fig.
  • one of the outer probes 252 can have a plunger rod 266 at its bottom.
  • the plunger 266 has the same cross-seccional area as each of the peripheral chambers A-F of the container 210 and can be used for forcing the contents of one peripheral chamber, below the probe 252, downwardly into a second chamber via the openings and channels in the top of the valve 220 by moving the probe 252 downwardly in the one chamber.
  • the center probe 256 can nave a filling tube 268 ac its bottom which can be used for filling the center chamber G of the container 210 with a sample to be prepared for analysis. If desired, the filling cube 268 can also be used for adding a wash liquid, a soivenc or a reagent to the center chamber G.
  • the filling tube 268 can be connected to a third convencional, multi-position, control valve 270 which is connected to sources of wash liquid, solvent and reagent, as w e l l as the samples to be analyzed.
  • the source of samples that is connected to the apparatus 250 and its third control valve 270, can be a conventional syringe S which can be actuated by a third conventional stepper motor M3 connected to the syringe.
  • the other outer probe 254 can have a needle 272 at its bottom that is adapted to be inserted into one of the peripheral chambers A-F of the container 210.
  • the needle 272 can be used to withdraw liquid samples, by vacuum, from a peripheral chamber A-F, as well as add a wash liquid, solvent or reagent to one of the peripheral chambers A-F.
  • the needle 272 can also be connected to the third valve 270, and the third valve can, in turn, be connected to a source of vacuum.
  • the source of vacuum, connected to the third valve 270 can be connected, in turn, to another contol valve (not shown) which is connected to: a) apparatus for disposal and recycling of waste material withdrawn from the container 210 of Fig. 8; and b) automatic or semi-automatic analysis equipment adapted to receive a sample prepared for analysis in the chambers A-F of the container 210.
  • the operations of the scepper motors M1, M2 and M3 and the concrol valves 260, 262 and 270, which control the hydraulic cylinders 258 and 259 and tne plunger 26c, filling tube 268 and needle 272, can be pre-programmed and aucomacically concrolled in a conventional manner so that they operate automatically to prepare a sample for analysis in the disposable container 210 of Fig. 8.
  • the probes 252, 254 and 256 can be sequentially inserted into the mouths 231 of the chambers A-G in the container 210 when the container is positioned beneath the probes by automatically: a) activating the first stepper motor M1 connected to the master cylinder 258 so that hydraulic pressure is supplied to the dependent cylinders 259; and b) setting the first and second control valves 260 and 262 so that the master cylinder 258 is connected to the tops of the dependent cylinders 259 and the reservoir R is connected to the bottoms of the dependent cylinders to lower the individual probes 252-256.
  • a sample, wash liquid, solvent and/or reagent can be added to, or withdrawn from, the various chambers A-G in any desired sequence by automatically activating the third motor M3 and/or regulating the position of the third valve 270.
  • the magazine 213 of the container 210 also can be rotated about its central vertical axis relative to the distributor valve 220 by automatically activating the second motor M2 to rotate the support structure 264 about the central vertical axis of the central probe 256 whereby the outer probes 252 and 254 urge the peripheral champers A-F, in which they are inserted, to rotate about tne central chamber G.
  • the probes can be automatically withdrawn from the chambers A-G by automatically: a) activating the first stepper motor Ml so that the master cylinder 258 supplies hydraulic pressure to the dependent cylinders 259; and b) setting the control valves 260 and 262 so that the master cylinder 258 is connected to the bottoms of the dependent cylinders 259 and the reservoir is connected to the tops of the dependent cylinders to raise the individual probes 252-256.
  • the outer probes 252 and 254 can be rotated as described above to position these probes above differenc peripheral chambers A-F and then can be reinserted into the different chambers as described above to perform different or additional sample preparation operations.
  • one or more channels 36 in valve 20 of container 10 of Figs. 1-4 can be provided witn additional openings 38 between the ends of the channels, so that each channel can provide fluid flow communication between the ports 30 of more than two chambers A-F.
  • one or more channels 36 in valve 20 of container 10 can be so configured that the openings 38 in the ends of the channels 36 provide fluid flow communication through the channels 36 between the ports 30 of chambers A-F which are not adjacent to one another about the central vertical axis of the magazine 13.
  • the sample preparation chambers A-G of the containers 10, 110 and 210 of Figs. 1-8 need not be generally cylindrical but are preferably vertically elongated.
  • all the mouths 31, 131 and 231 on top of the chambers A-G of the containers 10, 110 and 210 need not be open, and preferably one or more of the mouths will be closed with a conventional removable sealing member, such as a covering of foil or plastic film.
  • one or more of the chambers A-G will preferably be provided with a conventional flotation plug which can float upon, and thereby cover, any liquid entering the ports 30, 130 or 230 at the bottoms of the cnambers to reduce evaporation and prevent the liquid from overflowing the chamber through its open mouth 31. 131 or 231.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Récipient jetable (10) dans lequel on peut préparer comme d'ordinaire les échantillons pour l'analyse, qui comprend un boîtier généralement de forme cylindrique (13) contenant une pluralité d'éprouvettes de préparation d'échantillon dont le haut est couvert (A-F), chacune de ces éprouvettes étant munie à la base d'un orifice d'entrée/de sortie (30) ainsi qu'un clapet de distribution (20) se trouvant à l'extrémité inférieure du boîtier (13). Le haut du clapet (20) est muni de canaux (36) qui relient les ouvertures (38) à l'extrémité supérieure du clapet (20), de sorte que chaque canal (36) met en communication par écoulement les orifices (30) des chambres (A-F), au-dessus des ouvertures (38) dans le canal (36). On peut faire pivoter le clapet (20) et le boîtier (13) l'un par rapport à l'autre autour de l'axe central du boîtier (13) pour placer les ouvertures (38) des canaux (36) au-dessous des orifices (30) des différentes combinaisons de chambres (A-F), afin de permettre une communication par écoulement entre des chambres différentes (A-F).
PCT/US1989/003835 1988-09-06 1989-09-06 Recipient jetable pour la preparation d'echantillons et procede permettant de preparer les echantillons pour l'analyse WO1990002934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US240,984 1988-09-06
US07/240,984 US4889692A (en) 1984-11-05 1988-09-06 Disposable sample preparation container

Publications (1)

Publication Number Publication Date
WO1990002934A1 true WO1990002934A1 (fr) 1990-03-22

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Application Number Title Priority Date Filing Date
PCT/US1989/003835 WO1990002934A1 (fr) 1988-09-06 1989-09-06 Recipient jetable pour la preparation d'echantillons et procede permettant de preparer les echantillons pour l'analyse

Country Status (3)

Country Link
US (1) US4889692A (fr)
AU (1) AU4217889A (fr)
WO (1) WO1990002934A1 (fr)

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